Plan bracing

[TG6]

Take a square tower back propping a slab - 3.2m high, 1.5m lifts, braced all round. Standard load around 15 kN.
Can anyone justify a main contractor's requirement to put in 3 levels of plan bracing with words or numbers?

 

[drifta]

A good question for our inhouse designers! Do it and charge him

 

[scaffy 1980]

Seems strange as all the load is downward. If it was side load then it could explain it ad it would stop any twist or buckle between standards.

 

[TG6]

Even if there were a lateral load it wouldn't need plan bracing. With the bracing on each face there is sufficient capacity to pin the nodes & maintain the tower in position (unless the standards were free to move up or down).

If it could be proven to be necessary to have plan bracing by calculation, Drifta, I would almost be prepared to pay for that proof!

 

[IDH]

Contractor is an ar8e.
As long as bracing is to 1.5m nodes then Le is 1.5m. No PB required.

 

[TG6]

I bet Contractor is one of your customers.

It's the same contractor who had 1 tonne kelly blocks to stop a pedestrian barrier blowing across the site. The problem is that insisting on stuff like that is proven to be the right thing because it didn't fail last time so it must be the right thing to do and so it goes on.

 

[IDH]

I bet Contractor is one of your customers.

It's the same contractor who had 1 tonne kelly blocks to stop a pedestrian barrier blowing across the site. The problem is that insisting on stuff like that is proven to be the right thing because it didn't fail last time so it must be the right thing to do and so it goes on.

If he's one of my Customers then I take it back - he's adopting a very sensible approach and mitigating potential risks where they occur. If this Customer is watching we would be very happy to undertake a design check for our normal fee